/** * host.c - DesignWare USB3 DRD Controller Host Glue * * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com * * Authors: Felipe Balbi , * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 of * the License as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include #include "core.h" static int dwc3_host_get_irq(struct dwc3 *dwc) { struct platform_device *dwc3_pdev = to_platform_device(dwc->dev); int irq; irq = platform_get_irq_byname(dwc3_pdev, "host"); if (irq > 0) goto out; if (irq == -EPROBE_DEFER) goto out; irq = platform_get_irq_byname(dwc3_pdev, "dwc_usb3"); if (irq > 0) goto out; if (irq == -EPROBE_DEFER) goto out; irq = platform_get_irq(dwc3_pdev, 0); if (irq > 0) goto out; if (irq != -EPROBE_DEFER) dev_err(dwc->dev, "missing host IRQ\n"); if (!irq) irq = -EINVAL; out: return irq; } int dwc3_host_init(struct dwc3 *dwc) { struct property_entry props[2]; struct platform_device *xhci; int ret, irq; struct resource *res; struct platform_device *dwc3_pdev = to_platform_device(dwc->dev); irq = dwc3_host_get_irq(dwc); if (irq < 0) return irq; res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ, "host"); if (!res) res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ, "dwc_usb3"); if (!res) res = platform_get_resource(dwc3_pdev, IORESOURCE_IRQ, 0); if (!res) return -ENOMEM; dwc->xhci_resources[1].start = irq; dwc->xhci_resources[1].end = irq; dwc->xhci_resources[1].flags = res->flags; dwc->xhci_resources[1].name = res->name; xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO); if (!xhci) { dev_err(dwc->dev, "couldn't allocate xHCI device\n"); return -ENOMEM; } xhci->dev.parent = dwc->dev; dwc->xhci = xhci; ret = platform_device_add_resources(xhci, dwc->xhci_resources, DWC3_XHCI_RESOURCES_NUM); if (ret) { dev_err(dwc->dev, "couldn't add resources to xHCI device\n"); goto err1; } memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props)); if (dwc->usb3_lpm_capable) { props[0].name = "usb3-lpm-capable"; ret = platform_device_add_properties(xhci, props); if (ret) { dev_err(dwc->dev, "failed to add properties to xHCI\n"); goto err1; } } phy_create_lookup(dwc->usb2_generic_phy, "usb2-phy", dev_name(dwc->dev)); phy_create_lookup(dwc->usb3_generic_phy, "usb3-phy", dev_name(dwc->dev)); ret = platform_device_add(xhci); if (ret) { dev_err(dwc->dev, "failed to register xHCI device\n"); goto err2; } return 0; err2: phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy", dev_name(dwc->dev)); phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy", dev_name(dwc->dev)); err1: platform_device_put(xhci); return ret; } void dwc3_host_exit(struct dwc3 *dwc) { phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy", dev_name(dwc->dev)); phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy", dev_name(dwc->dev)); platform_device_unregister(dwc->xhci); } ype='hidden' name='id' value='064c3db9c564cc5be514ac21fb4aa26cc33db746'/>
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authorArvind Yadav <arvind.yadav.cs@gmail.com>2016-12-12 23:13:27 +0530
committerTejun Heo <tj@kernel.org>2017-01-06 15:45:32 -0500
commit064c3db9c564cc5be514ac21fb4aa26cc33db746 (patch)
tree9875da27d40d874837ecca529ba42e54bcc56b10 /drivers/usb/mtu3/mtu3_plat.c
parent2dae99558e86894e9e5dbf097477baaa5eb70134 (diff)
ata: sata_mv:- Handle return value of devm_ioremap.
Here, If devm_ioremap will fail. It will return NULL. Then hpriv->base = NULL - 0x20000; Kernel can run into a NULL-pointer dereference. This error check will avoid NULL pointer dereference. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org> Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers/usb/mtu3/mtu3_plat.c')